Hello SoSorry4U,
No, the numbers are not fixed. 

Every now and then, someone complains about "too many doubles" or "fixed dice". But fact is that if you rolled the dice often enough, you'd see that everything is statistically balanced. The law of probability applies 100%. The dice are random.

Please read this post by a FlyOrDie developer  

https://www.flyordie.com/forum/201645?s=hn

 and I'm sure it will become clear to you.  

Kind regards,
John